ER32 · DIN 6499
ER32 collets
ER32 collets close 1 mm below nominal. Order the size on the shank, not the size you wish it was.
An ER32 collet marked 12 grips anything from 11 to 12 mm. Put a 1/2 in shank in it (12.7 mm) and it will not close, full stop. Put a 10 mm shank in a 12 and it will close, sort of, on the front lip only, and the tool walks out on the first heavy pass. We sell ER32 collets from 2 to 20 mm singly or as the 18-piece set in 1 mm steps, and every collet we ship has its nominal size and range printed on it. We will not ship one that does not.
Accuracy class matters more than the brand name on the box. DIN 6499 class 2 (commonly sold as "standard") allows 0.010 mm TIR at the nose and is fine for drills and roughers. Class 1, 0.005 mm, is worth it on small carbide end mills where runout goes straight into uneven flute load and early chipping. The class is stated on the quote. Inch-sized ER32 collets exist and we supply them, but check your nut: a sealed collet for through-coolant needs its own nut style.
- Clamping range
- 1 mm below nominal, 2–20 mm
- Accuracy
- DIN 6499 class 2 (0.010 mm) or class 1 (0.005 mm)
- Set
- 18 pieces, 3–20 mm in 1 mm steps, with rack
- Variants
- Standard, sealed for coolant-through, inch nominal
- Nut
- Hex or mini nut, matched to your chuck body
Price basisPer collet or per 18-piece set, quoted on inquiry
Typical lead 1–5 business days
